Collar for shafts.



. No. 807,874. PATENTED DEC. 19, 1905- J. SHEBHAN.

COLLAR FOR SHAFTS.

APPLICATION FILED Mum. 1905.

Wifnmw: 7(Mimwm W.

JOHN SHEEHAN, OF NORTH BRADDOOK, PENNSYLVANIA.

COLLAR FOR SHAFTS.

Specification of Letters Patent.

Patented Dec. 19, 1905.

Application filed March 1, 1905. Serial No. 247,945.

10 LLM w/wm it may concern.-

Be it known that 1, JOHN SHEEHAN, a citizen of the United States of America, residing at North Braddock, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Collars for Shafts, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to certain new and useful improvements in collars for shafts, and more particularly to that type of collar employed for the ositioning of a ulley or wheel upon a sha t and limiting t e movement of said wheel or pulley.

This invention has for its obj ect the provision of novel means for securing a collar upon a shaft whereby it will be firmly held thereon and can be easily and quickly detached at any time.

A further object of this invention is to employ novel fastening means for a collar that can be embodied in the collar, whereby no portion of the fastening means will protrude outside of said collar.

Heretofore it has been the practice to employ an ordinary set-screw to secure collars upon a shaft, and these set-screws have protruded outside of the collar and have been very dangerous elements to persons moving in and out among machinery on account of these set-screws having a tendency to engage in any loose clothing or articles that may be brought into contact with the same. These set-screws have also injured the hands of a great many persons who have come into contact with the same, and for the above reasons I have dispensed with the use of set-screws and employ novel means for detachably securing collars to a shaft.

WVith the above and other'objects in view the invention finally consists in the novel construction, combination, and arrangement of parts, which will be hereinafter more fully described and then specifically pointed out in the claims, and, referring to thedrawings accompanying this application, like numerals of reference designate corresponding parts throughout the several views, in which-- Figure 1 is a top plan view of a collar mounted upon a shaft. Fig. 2 is a horizontal sectional view of a collar as secured upon the end of a shaft. Fig. 3 is an end view of a shaft, illustrating one of my improved collars Fig. 4 is a top plan view of secured thereto.

a modified form of fastening means, and Fig. 5 1s a horizontal sectional view of the same.

To put my invention into practice, I employ a collar 1, which is preferably annular in cross-section, and in the sides of the central opening 2 of said collar I form a recess 3. This recess is elliptical in cross-section, as illustrated in Fig. 3 of the drawings, consequently causing two sides of the collar to be heavier, as indicated at 4, than the diametrically-opposed sides 5 5. When the collar is mounted upon the end of a shaft 6, an elliptical cam-path is formed between the outer face of the shaft and the walls of the recess 3. The diametrically-opposed sides 5 5 of the collar are provided with apertures 7 7, and a pin 8 is employed to lock the collar upon the end of the shaft 6. The pin is formed of a length shorter than the greatest diameter of the elliptical path or of a length shorter than the distance between the opposed sides 5 5 of the collar. The end. of the shaft is provided with a transverselydisposed aperture 9, which is adapted to receive the pin 8. Then the pin has been placed in the aperture 9 of the end of the shaft, the collar is rotated until the ends of the pin engage the sides of the recess 3, the rotation of said collar causing the pin to become impinged upon the cam-path and rigidly hold the collar in this position. It will of course be understood that the collar is rotated when securing it upon the shaft in the direction in which the collar will subsequently rotate. By this construction the pin 8 is contained within the collar, and no part thereof is exposed during the rotation of the shaft 6 or the collar 1.

In Figs. 4 and 5 of the drawings I have illustrated a slight modification which con sists of providing the collar 1 with an aperture 10 through which the head 12 of a pin 14 is adapted to pass. This pin extends through the aperture 9, formed transversely in the shaft, and the lower end of the pin engages the collar, as indicated at 15, a second aperture 11 being formed in the casing similar to aperture 10. The pin 14 serves functionally the same purpose as the pin 8, and while I have herein shown and described this construction as a modification I do not care to limit myself to the preferred form of construction, as the construction illustrated in Figs. 4 and 5 can readily be employed for the same purpose as the construction illustrated in Figs. 1 to 3, inclusive.

What I claim, and desire to secure-by Letters Patent, is-

1. In a collar for shafts, the combination With a shaft having an aperture formed therein, of a collar having an elliptical recess formed in its one face, said collar having diametrically opposite apertures formed therein, and a pin adapted to engage in the aperture of said shaft and impinge in said recess, substantially as described.

2. In a collar for shafts, the combination with a shaft having an aperture in its end, of

JOHN SI-IEEI-IAN. I/Vitnesses K. H. BUTLER, E. E. POTTER. 

